Interwest Construction Inc. 12/17/2025

CITY OF EVERETT SPECIAL PROVISIONS Water Main Replacement “Y” – Ph 2 Div 5 – SURF TREATMTS & PVMTS October 2025 Work Order No. UP 3814 SP-161 Category 2: Sensitive information Category 2: For official use only / disclosure permissible by law. 5-04.2(2)B Using Warm Mix Asphalt Process The Contractor may elect to use additives that reduce the optimum mixing temperature or serve as a compaction aid for producing HMA. Additives include organic additives, chemical additives, and foaming processes. The use of Additives is subject to the following: a. Do not use additives that reduce the mixing temperature more than allowed in Section 5-04.3(6) in the production of mixtures. b. Before using additives, obtain the Engineer’s approval using WSDOT Form 350-076 to describe the proposed additive and process. 5-04.3 Construction Requirements 5-04.3(1) Weather Limitations Do not place HMA for wearing course on any Traveled Way beginning October 1st through March 31st of the following year without written concurrence from the Engineer. Do not place HMA on any wet surface, or when the average surface temperatures are less than those specified in Table 1, or when weather conditions otherwise prevent the proper handling or finishing of the HMA. Table 1 – Minimum Surface Temperature for Paving Compacted Thickness (Feet) Wearing Course Other Courses Less than 0.10 55°F 45°F 0.10 to .20 45°F 35°F More than 0.20 35°F 35°F 5-04.3(2) Paving Under Traffic Apply the requirements of this Section when the Roadway being paved is open to traffic. Keep intersections open to traffic at all times, except; when paving the intersection or paving across the intersection. During such time, and provided that there has been an advance warning to the public, the intersection may be closed for the minimum time required to place and compact the mixture. In hot weather, the Engineer may require the application of water to the pavement to accelerate the finish rolling of the pavement and to shorten the time required before reopening to traffic. Before closing an intersection, place advance warning signs and signs marking the detour or alternate route. During paving operations, maintain temporary pavement markings throughout the project. Install temporary pavement markings on the Roadway prior to opening to traffic. Provide temporary pavement markings in accordance with Section 8-23. Include all costs in connection with performing the Work in accordance with these requirements, except the cost of temporary pavement markings, in the unit Contract prices for the various Bid items involved in the Contract. 5-04.3(3) Equipment 5-04.3(3)A Mixing Plant Provide plants used for the preparation of HMA conforming to the following requirements: 1. Equipment for Preparation of Asphalt Binder – Equip tanks for the storage of asphalt binder to heat and hold the material at the required temperatures. Accomplish the heating by steam coils, electricity, or other approved means so